How to create a model from drawings just like Smoothie-3D, Paint 3D or Monster Mash?
Okay, I finally figured out how to do it. I hope the explanation below can help other users. To understand the process in more detail, I recommend the tutorial &quot;Blender Sculpting Tutorial: Full Advanced Creature Creation Workflow&quot; by CG Boost on YouTube.


With any model selected, in Sculpt Mode with the Lasso Trim tool, I change Trim Mode = Join and Shape Orientation = View in the header. Enable Use Cursor for Depth if you want to control the length of the model in proportion to the radius of the brush. The smaller the radius, the thinner the object will be.


Then I draw the shapes to create the silhouettes.



To rearrange the mesh, I use the Remesh command (header) after defining a Voxel Size.




And finally, to smooth and inflate the model to disappear with the hard edges, I use the Mesh Filter tool with Filter Types = Smooth / Inflate. Keep X/Y/Z active in Deform Axis and Orientation = View.





From there, any adjustment of scale, rotation and proportion can be made in Object or Edit Mode.